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/*
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2016-2019 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink_route.h"
#include "nlattr.h"
#include "netlink.h"
#include "types/fib_rules.h"
#include "xlat/fib_rule_actions.h"
#include "xlat/fib_rule_flags.h"
#include "xlat/rtnl_rule_attrs.h"
static bool
decode_rule_addr(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
const struct_fib_rule_hdr *const msg = opaque_data;
decode_inet_addr(tcp, addr, len, msg->family, NULL);
return true;
}
static bool
decode_fib_rule_uid_range(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct_fib_rule_uid_range range;
if (len < sizeof(range))
return false;
else if (!umove_or_printaddr(tcp, addr, &range)) {
tprint_struct_begin();
PRINT_FIELD_U(range, start);
tprint_struct_next();
PRINT_FIELD_U(range, end);
tprint_struct_end();
}
return true;
}
static bool
decode_rule_port_range(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct_fib_rule_port_range range;
if (len < sizeof(range))
return false;
else if (!umove_or_printaddr(tcp, addr, &range)) {
tprint_struct_begin();
PRINT_FIELD_U(range, start);
tprint_struct_next();
PRINT_FIELD_U(range, end);
tprint_struct_end();
}
return true;
}
static const nla_decoder_t fib_rule_hdr_nla_decoders[] = {
[FRA_DST] = decode_rule_addr,
[FRA_SRC] = decode_rule_addr,
[FRA_IIFNAME] = decode_nla_str,
[FRA_GOTO] = decode_nla_u32,
[FRA_PRIORITY] = decode_nla_u32,
[FRA_FWMARK] = decode_nla_u32,
[FRA_FLOW] = decode_nla_u32,
[FRA_TUN_ID] = decode_nla_be64,
[FRA_SUPPRESS_IFGROUP] = decode_nla_u32,
[FRA_SUPPRESS_PREFIXLEN] = decode_nla_u32,
[FRA_TABLE] = decode_nla_rt_class,
[FRA_FWMASK] = decode_nla_u32,
[FRA_OIFNAME] = decode_nla_str,
[FRA_PAD] = NULL,
[FRA_L3MDEV] = decode_nla_u8,
[FRA_UID_RANGE] = decode_fib_rule_uid_range,
[FRA_PROTOCOL] = decode_nla_rt_proto,
[FRA_IP_PROTO] = decode_nla_ip_proto,
[FRA_SPORT_RANGE] = decode_rule_port_range,
[FRA_DPORT_RANGE] = decode_rule_port_range,
};
DECL_NETLINK_ROUTE_DECODER(decode_fib_rule_hdr)
{
struct_fib_rule_hdr msg = { .family = family };
size_t offset = sizeof(msg.family);
bool decode_nla = false;
tprint_struct_begin();
PRINT_FIELD_XVAL(msg, family, addrfams, "AF_???");
tprints(", ");
if (len >= sizeof(msg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(msg) - offset,
(char *) &msg + offset)) {
PRINT_FIELD_U(msg, dst_len);
tprint_struct_next();
PRINT_FIELD_U(msg, src_len);
tprint_struct_next();
PRINT_FIELD_FLAGS(msg, tos,
ip_type_of_services, "IPTOS_TOS_???");
tprint_struct_next();
PRINT_FIELD_XVAL(msg, table,
routing_table_ids, "RT_TABLE_???");
tprint_struct_next();
PRINT_FIELD_XVAL(msg, action,
fib_rule_actions, "FR_ACT_???");
tprint_struct_next();
PRINT_FIELD_FLAGS(msg, flags,
fib_rule_flags, "FIB_RULE_???");
decode_nla = true;
}
} else
tprint_more_data_follows();
tprint_struct_end();
offset = NLMSG_ALIGN(sizeof(msg));
if (decode_nla && len > offset) {
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
rtnl_rule_attrs, "FRA_???",
fib_rule_hdr_nla_decoders,
ARRAY_SIZE(fib_rule_hdr_nla_decoders), &msg);
}
}
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